restore/dirs.c

   1 /*
   2  *      Ported to Linux's Second Extended File System as part of the
   3  *      dump and restore backup suit
   4  *      Remy Card <card@Linux.EU.Org>, 1994-1997
   5  *      Stelian Pop <stelian@popies.net>, 1999-2000
   6  *      Stelian Pop <stelian@popies.net> - Alcôve <www.alcove.com>, 2000-2002
   7  */
   8
   9 /*
  10  * Copyright (c) 1983, 1993
  11  *      The Regents of the University of California.  All rights reserved.
  12  * (c) UNIX System Laboratories, Inc.
  13  * All or some portions of this file are derived from material licensed
  14  * to the University of California by American Telephone and Telegraph
  15  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  16  * the permission of UNIX System Laboratories, Inc.
  17  *
  18  * Redistribution and use in source and binary forms, with or without
  19  * modification, are permitted provided that the following conditions
  20  * are met:
  21  * 1. Redistributions of source code must retain the above copyright
  22  *    notice, this list of conditions and the following disclaimer.
  23  * 2. Redistributions in binary form must reproduce the above copyright
  24  *    notice, this list of conditions and the following disclaimer in the
  25  *    documentation and/or other materials provided with the distribution.
  26  * 3. Neither the name of the University nor the names of its contributors
  27  *    may be used to endorse or promote products derived from this software
  28  *    without specific prior written permission.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  31  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  34  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  35  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  36  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  37  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  38  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  39  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  40  * SUCH DAMAGE.
  41  */
  42
  43 #ifndef lint
  44 static const char rcsid[] =
  45         "$Id: dirs.c,v 1.24 2003/10/26 16:05:47 stelian Exp $";
  46 #endif /* not lint */
  47
  48 #include <config.h>
  49 #include <sys/types.h>
  50 #include <sys/param.h>
  51 #include <sys/file.h>
  52 #include <sys/stat.h>
  53
  54 #ifdef  __linux__
  55 #ifdef HAVE_EXT2FS_EXT2_FS_H
  56 #include <ext2fs/ext2_fs.h>
  57 #else
  58 #include <linux/ext2_fs.h>
  59 #endif
  60 #include <bsdcompat.h>
  61 #else   /* __linux__ */
  62 #ifdef sunos
  63 #include <sys/fcntl.h>
  64 #include <bsdcompat.h>
  65 #else
  66 #include <ufs/ufs/dinode.h>
  67 #include <ufs/ufs/dir.h>
  68 #endif
  69 #endif  /* __linux__ */
  70 #include <protocols/dumprestore.h>
  71
  72 #include <compaterr.h>
  73 #include <errno.h>
  74 #include <stdio.h>
  75 #include <stdlib.h>
  76 #include <string.h>
  77 #include <unistd.h>
  78
  79 #ifdef  __linux__
  80 #include <endian.h>
  81 #else
  82 #ifdef sunos
  83 #include <arpa/nameser_compat.h>
  84 #else
  85 #include <machine/endian.h>
  86 #endif
  87 #endif
  88
  89 #include "pathnames.h"
  90 #include "restore.h"
  91 #include "extern.h"
  92
  93 /*
  94  * Symbol table of directories read from tape.
  95  */
  96 #define HASHSIZE        1000
  97 #define INOHASH(val) (val % HASHSIZE)
  98 struct inotab {
  99         struct  inotab *t_next;
 100         dump_ino_t t_ino;
 101         int32_t t_seekpt;
 102         int32_t t_size;
 103 };
 104 static struct inotab *inotab[HASHSIZE];
 105
 106 /*
 107  * Information retained about directories.
 108  */
 109 struct modeinfo {
 110         dump_ino_t ino;
 111         struct timeval timep[2];
 112         mode_t mode;
 113         uid_t uid;
 114         gid_t gid;
 115         unsigned int flags;
 116 };
 117
 118 /*
 119  * Definitions for library routines operating on directories.
 120  */
 121 #undef DIRBLKSIZ
 122 #define DIRBLKSIZ 1024
 123 struct rstdirdesc {
 124         int     dd_fd;
 125         int32_t dd_loc;
 126         int32_t dd_size;
 127         char    dd_buf[DIRBLKSIZ];
 128 };
 129
 130 /*
 131  * Global variables for this file.
 132  */
 133 static long     seekpt;
 134 static FILE     *df, *mf;
 135 static RST_DIR  *dirp;
 136 static char     dirfile[MAXPATHLEN] = "#";      /* No file */
 137 static char     modefile[MAXPATHLEN] = "#";     /* No file */
 138 static char     dot[2] = ".";                   /* So it can be modified */
 139
 140 /*
 141  * Format of old style directories.
 142  */
 143 #define ODIRSIZ 14
 144 struct odirect {
 145         u_short d_ino;
 146         char    d_name[ODIRSIZ];
 147 };
 148
 149 #if defined(__linux__) || defined(sunos)
 150 static struct inotab    *allocinotab __P((dump_ino_t, struct new_bsd_inode *, long));
 151 #else
 152 static struct inotab    *allocinotab __P((dump_ino_t, struct dinode *, long));
 153 #endif
 154 static void              dcvt __P((struct odirect *, struct direct *));
 155 static void              flushent __P((void));
 156 static struct inotab    *inotablookup __P((dump_ino_t));
 157 static RST_DIR          *opendirfile __P((const char *));
 158 static void              putdir __P((char *, size_t));
 159 static void              putent __P((struct direct *));
 160 static void              rst_seekdir __P((RST_DIR *, long, long));
 161 static long              rst_telldir __P((RST_DIR *));
 162 static struct direct    *searchdir __P((dump_ino_t, char *));
 163
 164 #ifdef sunos
 165 extern int fdsmtc;
 166 #endif
 167
 168 /*
 169  *      Extract directory contents, building up a directory structure
 170  *      on disk for extraction by name.
 171  *      If genmode is requested, save mode, owner, and times for all
 172  *      directories on the tape.
 173  */
 174 void
 175 extractdirs(int genmode)
 176 {
 177         int i;
 178 #if defined(__linux__) || defined(sunos)
 179         struct new_bsd_inode *ip;
 180 #else
 181         struct dinode *ip;
 182 #endif
 183         struct inotab *itp;
 184         struct direct nulldir;
 185         int fd;
 186
 187         Vprintf(stdout, "Extract directories from tape\n");
 188         (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%ld", tmpdir,
 189                 (long)dumpdate);
 190         if (command != 'r' && command != 'R') {
 191                 (void) strncat(dirfile, "-XXXXXX",
 192                         sizeof(dirfile) - strlen(dirfile));
 193                 fd = mkstemp(dirfile);
 194         } else
 195                 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
 196         if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
 197                 if (fd != -1)
 198                         close(fd);
 199                 err(1, "cannot create directory temporary %s", dirfile);
 200         }
 201         if (genmode != 0) {
 202                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%ld", tmpdir, (long)dumpdate);
 203                 if (command != 'r' && command != 'R') {
 204                         (void) strncat(modefile, "-XXXXXX",
 205                                 sizeof(modefile) - strlen(modefile));
 206                         fd = mkstemp(modefile);
 207                 } else
 208                         fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
 209                 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
 210                         if (fd != -1)
 211                                 close(fd);
 212                         err(1, "cannot create modefile %s", modefile);
 213                 }
 214         }
 215         nulldir.d_ino = 0;
 216         nulldir.d_type = DT_DIR;
 217         nulldir.d_namlen = 1;
 218         nulldir.d_name[0] = '/';
 219         nulldir.d_name[1] = '\0';
 220         nulldir.d_reclen = DIRSIZ(0, &nulldir);
 221         for (;;) {
 222                 curfile.name = "<directory file - name unknown>";
 223                 curfile.action = USING;
 224                 ip = curfile.dip;
 225                 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
 226                         if ( fclose(df) == EOF )
 227                                 err(1, "cannot write to file %s", dirfile);
 228                         dirp = opendirfile(dirfile);
 229                         if (dirp == NULL)
 230                                 warn("opendirfile");
 231                         if (mf != NULL && fclose(mf) == EOF )
 232                                 err(1, "cannot write to file %s", dirfile);
 233                         i = dirlookup(dot);
 234                         if (i == 0)
 235                                 panic("Root directory is not on tape\n");
 236                         return;
 237                 }
 238                 itp = allocinotab(curfile.ino, ip, seekpt);
 239                 getfile(putdir, xtrnull);
 240                 putent(&nulldir);
 241                 flushent();
 242                 itp->t_size = seekpt - itp->t_seekpt;
 243         }
 244 }
 245
 246 /*
 247  * skip over all the directories on the tape
 248  */
 249 void
 250 skipdirs(void)
 251 {
 252
 253         while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
 254                 skipfile();
 255         }
 256 }
 257
 258 /*
 259  *      Recursively find names and inumbers of all files in subtree
 260  *      pname and pass them off to be processed.
 261  */
 262 void
 263 treescan(char *pname, dump_ino_t ino, long (*todo) __P((char *, dump_ino_t, int)))
 264 {
 265         struct inotab *itp;
 266         struct direct *dp;
 267         int namelen;
 268         long bpt;
 269         char locname[MAXPATHLEN + 1];
 270
 271         itp = inotablookup(ino);
 272         if (itp == NULL) {
 273                 /*
 274                  * Pname is name of a simple file or an unchanged directory.
 275                  */
 276                 (void) (*todo)(pname, ino, LEAF);
 277                 return;
 278         }
 279         /*
 280          * Pname is a dumped directory name.
 281          */
 282         if ((*todo)(pname, ino, NODE) == FAIL)
 283                 return;
 284         /*
 285          * begin search through the directory
 286          * skipping over "." and ".."
 287          */
 288         namelen = snprintf(locname, sizeof(locname), "%s/", pname);
 289         if (namelen >= (int)sizeof(locname))
 290                 namelen = sizeof(locname) - 1;
 291         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 292         dp = rst_readdir(dirp); /* "." */
 293         if (dp != NULL && strcmp(dp->d_name, ".") == 0)
 294                 dp = rst_readdir(dirp); /* ".." */
 295         else
 296                 fprintf(stderr, "Warning: `.' missing from directory %s\n",
 297                         pname);
 298         if (dp != NULL && strcmp(dp->d_name, "..") == 0)
 299                 dp = rst_readdir(dirp); /* first real entry */
 300         else
 301                 fprintf(stderr, "Warning: `..' missing from directory %s\n",
 302                         pname);
 303         bpt = rst_telldir(dirp);
 304         /*
 305          * a zero inode signals end of directory
 306          */
 307         while (dp != NULL) {
 308                 locname[namelen] = '\0';
 309                 if (namelen + dp->d_namlen >= (int)sizeof(locname)) {
 310                         fprintf(stderr, "%s%s: name exceeds %ld char\n",
 311                                 locname, dp->d_name, (long)sizeof(locname) - 1);
 312                 } else {
 313                         (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
 314                         treescan(locname, dp->d_ino, todo);
 315                         rst_seekdir(dirp, bpt, itp->t_seekpt);
 316                 }
 317                 dp = rst_readdir(dirp);
 318                 bpt = rst_telldir(dirp);
 319         }
 320 }
 321
 322 /*
 323  * Lookup a pathname which is always assumed to start from the ROOTINO.
 324  */
 325 struct direct *
 326 pathsearch(const char *pathname)
 327 {
 328         dump_ino_t ino;
 329         struct direct *dp;
 330         char *path, *name, buffer[MAXPATHLEN];
 331
 332         strcpy(buffer, pathname);
 333         path = buffer;
 334         ino = ROOTINO;
 335         while (*path == '/')
 336                 path++;
 337         dp = NULL;
 338 #ifdef __linux__
 339         while ((name = strsep(&path, "/")) != NULL && *name /* != NULL */) {
 340 #else
 341         while ((name = strtok_r(NULL, "/", &path)) != NULL && *name /* != NULL */) {
 342 #endif
 343                 if ((dp = searchdir(ino, name)) == NULL)
 344                         return (NULL);
 345                 ino = dp->d_ino;
 346         }
 347         return (dp);
 348 }
 349
 350 /*
 351  * Lookup the requested name in directory inum.
 352  * Return its inode number if found, zero if it does not exist.
 353  */
 354 static struct direct *
 355 searchdir(dump_ino_t inum, char *name)
 356 {
 357         struct direct *dp;
 358         struct inotab *itp;
 359         int len;
 360
 361         itp = inotablookup(inum);
 362         if (itp == NULL)
 363                 return (NULL);
 364         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 365         len = strlen(name);
 366         do {
 367                 dp = rst_readdir(dirp);
 368                 if (dp == NULL)
 369                         return (NULL);
 370         } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
 371         return (dp);
 372 }
 373
 374 /*
 375  * Put the directory entries in the directory file
 376  */
 377 static void
 378 putdir(char *buf, size_t size)
 379 {
 380         struct direct cvtbuf;
 381         struct odirect *odp;
 382         struct odirect *eodp;
 383         struct direct *dp;
 384         long loc, i;
 385
 386         if (cvtflag) {
 387                 eodp = (struct odirect *)&buf[size];
 388                 for (odp = (struct odirect *)buf; odp < eodp; odp++)
 389                         if (odp->d_ino != 0) {
 390                                 dcvt(odp, &cvtbuf);
 391                                 putent(&cvtbuf);
 392                         }
 393         } else {
 394                 for (loc = 0; loc < (long)size; ) {
 395                         dp = (struct direct *)(buf + loc);
 396 #ifdef  DIRDEBUG
 397                         printf ("reclen = %d, namlen = %d, type = %d\n",
 398                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 399 #endif
 400                         if (Bcvt)
 401                                 swabst((u_char *)"is", (u_char *) dp);
 402                         if (oldinofmt && dp->d_ino != 0) {
 403 #                               if BYTE_ORDER == BIG_ENDIAN
 404                                         if (Bcvt)
 405                                                 dp->d_namlen = dp->d_type;
 406 #                               else
 407                                         if (!Bcvt)
 408                                                 dp->d_namlen = dp->d_type;
 409 #                               endif
 410                                 if (dp->d_namlen == 0 && dp->d_type != 0)
 411                                         dp->d_namlen = dp->d_type;
 412                                 dp->d_type = DT_UNKNOWN;
 413                         }
 414 #ifdef  DIRDEBUG
 415                         printf ("reclen = %d, namlen = %d, type = %d\n",
 416                                 dp->d_reclen, dp->d_namlen, dp->d_type);
 417 #endif
 418                         i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
 419                         if ((dp->d_reclen & 0x3) != 0 ||
 420                             dp->d_reclen > i ||
 421                             dp->d_reclen < DIRSIZ(0, dp) ||
 422                             dp->d_namlen > MAXNAMLEN) {
 423                                 Vprintf(stdout, "Mangled directory: ");
 424                                 if ((dp->d_reclen & 0x3) != 0)
 425                                         Vprintf(stdout,
 426                                            "reclen not multiple of 4 ");
 427                                 if (dp->d_reclen < DIRSIZ(0, dp))
 428                                         Vprintf(stdout,
 429                                            "reclen less than DIRSIZ (%d < %d) ",
 430                                            dp->d_reclen, DIRSIZ(0, dp));
 431                                 if (dp->d_namlen > MAXNAMLEN)
 432                                         Vprintf(stdout,
 433                                            "reclen name too big (%d > %d) ",
 434                                            dp->d_namlen, MAXNAMLEN);
 435                                 Vprintf(stdout, "\n");
 436                                 loc += i;
 437                                 continue;
 438                         }
 439                         loc += dp->d_reclen;
 440                         if (dp->d_ino != 0) {
 441                                 putent(dp);
 442                         }
 443                 }
 444         }
 445 }
 446
 447 /*
 448  * These variables are "local" to the following two functions.
 449  */
 450 static char dirbuf[DIRBLKSIZ];
 451 static long dirloc = 0;
 452 static long prev = 0;
 453
 454 /*
 455  * add a new directory entry to a file.
 456  */
 457 static void
 458 putent(struct direct *dp)
 459 {
 460         dp->d_reclen = DIRSIZ(0, dp);
 461         if (dirloc + dp->d_reclen > DIRBLKSIZ) {
 462                 ((struct direct *)(dirbuf + prev))->d_reclen =
 463                     DIRBLKSIZ - prev;
 464                 if ( fwrite(dirbuf, 1, DIRBLKSIZ, df) != DIRBLKSIZ )
 465                         err(1,"cannot write to file %s", dirfile);
 466                 dirloc = 0;
 467         }
 468         memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
 469         prev = dirloc;
 470         dirloc += dp->d_reclen;
 471 }
 472
 473 /*
 474  * flush out a directory that is finished.
 475  */
 476 static void
 477 flushent(void)
 478 {
 479         ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
 480         if ( fwrite(dirbuf, (int)dirloc, 1, df) != 1 )
 481                 err(1, "cannot write to file %s", dirfile);
 482         seekpt = ftell(df);
 483         if (seekpt == -1)
 484                 err(1, "cannot write to file %s", dirfile);
 485         dirloc = 0;
 486 }
 487
 488 static void
 489 dcvt(struct odirect *odp, struct direct *ndp)
 490 {
 491
 492         memset(ndp, 0, (size_t)(sizeof *ndp));
 493         ndp->d_ino =  odp->d_ino;
 494         ndp->d_type = DT_UNKNOWN;
 495         (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
 496         ndp->d_namlen = strlen(ndp->d_name);
 497         ndp->d_reclen = DIRSIZ(0, ndp);
 498 }
 499
 500 /*
 501  * Seek to an entry in a directory.
 502  * Only values returned by rst_telldir should be passed to rst_seekdir.
 503  * This routine handles many directories in a single file.
 504  * It takes the base of the directory in the file, plus
 505  * the desired seek offset into it.
 506  */
 507 static void
 508 rst_seekdir(RST_DIR *dirp, long loc, long base)
 509 {
 510
 511         if (loc == rst_telldir(dirp))
 512                 return;
 513         loc -= base;
 514         if (loc < 0)
 515                 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
 516         (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
 517         dirp->dd_loc = loc & (DIRBLKSIZ - 1);
 518         if (dirp->dd_loc != 0)
 519                 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
 520 }
 521
 522 /*
 523  * get next entry in a directory.
 524  */
 525 struct direct *
 526 rst_readdir(RST_DIR *dirp)
 527 {
 528         struct direct *dp;
 529
 530         for (;;) {
 531                 if (dirp->dd_loc == 0) {
 532                         dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
 533                             DIRBLKSIZ);
 534                         if (dirp->dd_size <= 0) {
 535                                 Dprintf(stderr, "error reading directory\n");
 536                                 return (NULL);
 537                         }
 538                 }
 539                 if (dirp->dd_loc >= dirp->dd_size) {
 540                         dirp->dd_loc = 0;
 541                         continue;
 542                 }
 543                 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
 544                 if (dp->d_reclen == 0 ||
 545                     dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
 546                         Dprintf(stderr, "corrupted directory: bad reclen %d\n",
 547                                 dp->d_reclen);
 548                         return (NULL);
 549                 }
 550                 dirp->dd_loc += dp->d_reclen;
 551                 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
 552                         return (NULL);
 553                 if (dp->d_ino >= maxino) {
 554                         Dprintf(stderr, "corrupted directory: bad inum %d\n",
 555                                 dp->d_ino);
 556                         continue;
 557                 }
 558                 return (dp);
 559         }
 560 }
 561
 562 /*
 563  * Simulate the opening of a directory
 564  */
 565 RST_DIR *
 566 rst_opendir(const char *name)
 567 {
 568         struct inotab *itp;
 569         RST_DIR *dirp;
 570         dump_ino_t ino;
 571
 572         if ((ino = dirlookup(name)) > 0 &&
 573             (itp = inotablookup(ino)) != NULL) {
 574                 dirp = opendirfile(dirfile);
 575                 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 576                 return (dirp);
 577         }
 578         return (NULL);
 579 }
 580
 581 /*
 582  * In our case, there is nothing to do when closing a directory.
 583  */
 584 void
 585 rst_closedir(RST_DIR *dirp)
 586 {
 587
 588         (void)close(dirp->dd_fd);
 589         free(dirp);
 590         return;
 591 }
 592
 593 /*
 594  * Simulate finding the current offset in the directory.
 595  */
 596 static long
 597 rst_telldir(RST_DIR *dirp)
 598 {
 599         return ((long)lseek(dirp->dd_fd,
 600             (OFF_T)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
 601 }
 602
 603 /*
 604  * Open a directory file.
 605  */
 606 static RST_DIR *
 607 opendirfile(const char *name)
 608 {
 609         RST_DIR *dirp;
 610         int fd;
 611
 612         if ((fd = open(name, O_RDONLY)) == -1)
 613                 return (NULL);
 614         if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
 615                 (void)close(fd);
 616                 return (NULL);
 617         }
 618         dirp->dd_fd = fd;
 619         dirp->dd_loc = 0;
 620         return (dirp);
 621 }
 622
 623 /*
 624  * Set the mode, owner, and times for all new or changed directories
 625  */
 626 void
 627 setdirmodes(int flags)
 628 {
 629         FILE *mf;
 630         struct modeinfo node;
 631         struct entry *ep;
 632         char *cp;
 633
 634         Vprintf(stdout, "Set directory mode, owner, and times.\n");
 635         if (command == 'r' || command == 'R')
 636                 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
 637         if (modefile[0] == '#') {
 638                 panic("modefile not defined\n");
 639                 fprintf(stderr, "directory mode, owner, and times not set\n");
 640                 return;
 641         }
 642         mf = fopen(modefile, "r");
 643         if (mf == NULL) {
 644                 warn("fopen");
 645                 fprintf(stderr, "cannot open mode file %s\n", modefile);
 646                 fprintf(stderr, "directory mode, owner, and times not set\n");
 647                 return;
 648         }
 649         clearerr(mf);
 650         for (;;) {
 651                 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
 652                 if (feof(mf))
 653                         break;
 654                 ep = lookupino(node.ino);
 655                 if (command == 'i' || command == 'x') {
 656                         if (ep == NULL)
 657                                 continue;
 658                         if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
 659                                 ep->e_flags &= ~NEW;
 660                                 continue;
 661                         }
 662                         if ((flags & FORCE) == 0 &&
 663                             node.ino == ROOTINO &&
 664                             reply("set owner/mode for '.'") == FAIL)
 665                                 continue;
 666                 }
 667                 if (ep == NULL) {
 668                         panic("cannot find directory inode %d\n", node.ino);
 669                 } else {
 670                         cp = myname(ep);
 671                         (void) chown(cp, node.uid, node.gid);
 672                         (void) chmod(cp, node.mode);
 673                         if (node.flags)
 674 #ifdef  __linux__
 675                                 (void) fsetflags(cp, node.flags);
 676 #else
 677 #ifdef sunos
 678 #else
 679                                 (void) chflags(cp, node.flags);
 680 #endif
 681 #endif
 682                         utimes(cp, node.timep);
 683                         ep->e_flags &= ~NEW;
 684                 }
 685         }
 686         if (ferror(mf))
 687                 panic("error setting directory modes\n");
 688         (void) fclose(mf);
 689 }
 690
 691 /*
 692  * Generate a literal copy of a directory.
 693  */
 694 int
 695 genliteraldir(char *name, dump_ino_t ino)
 696 {
 697         struct inotab *itp;
 698         int ofile, dp, i, size;
 699         char buf[BUFSIZ];
 700
 701         itp = inotablookup(ino);
 702         if (itp == NULL)
 703                 panic("Cannot find directory inode %d named %s\n", ino, name);
 704         if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
 705                 warn("%s: cannot create file\n", name);
 706                 return (FAIL);
 707         }
 708         rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
 709         dp = dup(dirp->dd_fd);
 710         for (i = itp->t_size; i > 0; i -= BUFSIZ) {
 711                 size = i < BUFSIZ ? i : BUFSIZ;
 712                 if (read(dp, buf, (int) size) == -1) {
 713                         warnx("write error extracting inode %lu, name %s\n",
 714                                 (unsigned long)curfile.ino, curfile.name);
 715                         err(1, "read");
 716                 }
 717                 if (!Nflag && write(ofile, buf, (int) size) == -1) {
 718                         warnx("write error extracting inode %lu, name %s\n",
 719                                 (unsigned long)curfile.ino, curfile.name);
 720                         err(1, "write");
 721                 }
 722         }
 723         (void) close(dp);
 724         (void) close(ofile);
 725         return (GOOD);
 726 }
 727
 728 /*
 729  * Determine the type of an inode
 730  */
 731 int
 732 inodetype(dump_ino_t ino)
 733 {
 734         struct inotab *itp;
 735
 736         itp = inotablookup(ino);
 737         if (itp == NULL)
 738                 return (LEAF);
 739         return (NODE);
 740 }
 741
 742 /*
 743  * Allocate and initialize a directory inode entry.
 744  * If requested, save its pertinent mode, owner, and time info.
 745  */
 746 static struct inotab *
 747 #if defined(__linux__) || defined(sunos)
 748 allocinotab(dump_ino_t ino, struct new_bsd_inode *dip, long seekpt)
 749 #else
 750 allocinotab(dump_ino_t ino, struct dinode *dip, long seekpt)
 751 #endif
 752 {
 753         struct inotab   *itp;
 754         struct modeinfo node;
 755
 756         itp = calloc(1, sizeof(struct inotab));
 757         if (itp == NULL)
 758                 panic("no memory directory table\n");
 759         itp->t_next = inotab[INOHASH(ino)];
 760         inotab[INOHASH(ino)] = itp;
 761         itp->t_ino = ino;
 762         itp->t_seekpt = seekpt;
 763         if (mf == NULL)
 764                 return (itp);
 765         node.ino = ino;
 766 #if defined(__linux__) || defined(sunos)
 767         node.timep[0].tv_sec = dip->di_atime.tv_sec;
 768         node.timep[0].tv_usec = dip->di_atime.tv_usec;
 769         node.timep[1].tv_sec = dip->di_mtime.tv_sec;
 770         node.timep[1].tv_usec = dip->di_mtime.tv_usec;
 771 #else   /* __linux__  || sunos */
 772         node.timep[0].tv_sec = dip->di_atime;
 773         node.timep[0].tv_usec = dip->di_atimensec / 1000;
 774         node.timep[1].tv_sec = dip->di_mtime;
 775         node.timep[1].tv_usec = dip->di_mtimensec / 1000;
 776 #endif  /* __linux__  || sunos */
 777         node.mode = dip->di_mode;
 778         node.flags = dip->di_flags;
 779         node.uid = dip->di_uid;
 780         node.gid = dip->di_gid;
 781         if ( fwrite((char *)&node, 1, sizeof(struct modeinfo), mf) != sizeof(struct modeinfo) )
 782                 err(1,"cannot write to file %s", modefile);
 783         return (itp);
 784 }
 785
 786 /*
 787  * Look up an inode in the table of directories
 788  */
 789 static struct inotab *
 790 inotablookup(dump_ino_t ino)
 791 {
 792         struct inotab *itp;
 793
 794         for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
 795                 if (itp->t_ino == ino)
 796                         return (itp);
 797         return (NULL);
 798 }
 799
 800 /*
 801  * Clean up and exit
 802  */
 803 void
 804 cleanup(void)
 805 {
 806         closemt();
 807         if (modefile[0] != '#')
 808                 (void) unlink(modefile);
 809         if (dirfile[0] != '#')
 810                 (void) unlink(dirfile);
 811 }